Black Box MT240A-R2 Manuel utilisateur

Support EIA-530

(V.36/RS-422), X.21,

or V.35 termina

interfaces.

Sync network data

rates up to 2.048 Mbps.

Make dua coax

BNC (75-ohm) and

twisted-pair (120-ohm)

network connections.

MicroRACK Card

versions and X.21-on y

mode a so avai ab e.

Standa one mode s

feature rate adaptation

for 256 kbps, 512 kbps,

and 1.024 Mbps.

Interna , externa , and

receive oopback

c ocking.

Easy to configure with

DIP switches and

jumpers.

hese Micro NTUs give you

everything you need to make

G.703 connections. Depending

on the model you order, you can

easily connect ridges or routers

with RS-530, X.21, or V.35

interfaces to G.703 networks.

Best of all, the device’s

versatility in data rates and

interfaces makes it ideal for

a variety of LAN and WAN

environments. Use it three ways:

•Use the Micro NTU as a

modem. As a modem, it

sends unstructured,

synchronous 2.048-M ps

data from a G.703/E1 network

to a router, ridge, or mux.

•Use the Micro NTU as an

interface converter. In this

application, it accepts either

75-ohm (dual coax) or

120-ohm (twisted-pair)

G.703/E1 signals and

converts them so your

RS-530, X.21, or V.35

equipment can understand

them. Dual coax and modular

interfaces are located on the

NTU’s rear panel. All

interfaces are switch-

selecta le and use an HD26

connector.

A G.703 modem, interface converter,

and rate adapter in one compact device.

KeyFeatures

MICRONTUS

•Use the Micro NTU as a rate

adapter. In this application

you can use the Micro NTU

to connect a device with a

lower andwidth (256 k ps,

512 k ps, or 1.024 M ps ) to

a 2.048-M ps G.703/E1 link.

The Micro NTU operates

from internal, external, or network

(received loop) clock sources.

In addition, the device includes

loop ack diagnostics and five

front-panel LEDs for easy

monitoring.

To configure the Micro NTU,

just set the externally accessi le

DIP switches and internal

jumpers. These switches and

jumpers ena le you to set

clocking, data rate, and test

options.

Choose from standalone

or card versions. Because the

standalone model features oth

75- and 120-ohm connections,

no special adapters are needed.

The card version features

all the enefits of the standalone

unit—without the multiplexor or

V.35 capa ilities—and has a mid-

plane architecture for full hot

swappa ility. It’s availa le in two

versions: 75-ohm dual coax and

120-ohm twisted pair. The 75-

ohm model includes dual BNC

connectors and a DB15 connector

for X.21 terminal connections.

The 120-ohm model includes

a modular jack and a DB25

connector for RS-530 (V.36/

RS-422) terminal connections.

For a diagram of just one

application for the Micro NTU,

see page 2. However, a more

typical application than that is to

use the Micro NTU to connect a

ridge or router—without a native

G.703 interface—to a 2.048-M ps

G.703 network. Used this way, the

ridge or router may have an

RS-530 (V.36/RS-422), V.35, or X.21

interface, and the G.703 network

may e coax or twisted pair.

The Micro NTU can e

deployed overseas as well. It’s

CE approved, it can e used in

most European countries, and

the standalone AC models come

with switch-selecta le 115-/

230-VAC power supplies.

Black Box Corporation • 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 724-746-5500 • www.blackbox.com • e-mail [email protected]

Black Box Corporation.

5/31/2005 #15970

Clocking: Internal, external, network

(receive loop)

Network Rate: 2.048 M ps

Receiver Sensitivity: -10 dB

(0 dB = 2.4V)

Speed: Network: 2.048 M ps;

Terminal: 256 k ps, 512 k ps,

1.024 M ps, 2.048 M ps

Diagnostics: Loop ack test

Terminal Interface:

MT240A-R2: EIA RS-530 (RS-422),

X.21, V.35 on HD26 F using

ca les (EHN092);

MT241A: X.21 on DB15 F;

MT245A: RS-530 on DB25 F;

MT246A: X.21 on DB15 F

Network Interface: G.703

Network Connectors: MT240A-R2,

MT241A: (2) BNC F (75-ohm) and

(1) modular RJ-45 (120-ohm);

MT245A: (1) modular RJ-45

(120-ohm);

MT246A: (2) BNC F (75-ohm)

Indicators: (5) LEDs: Power,

Network, Master Clock, Loop,

Loop ack

Power: MT240A-R2, MT241A:

230 VAC/50 Hz or 115 VAC/

60 Hz, switch-selecta le;

MT245A–MT246A: From the

MicroRACK chassis

Temperature Tolerance: Operating:

MT240A-R2, MT245A–MT246A:

32 to 140°F (0 to 60°C);

MT241A: 32 to 122°F (0 to 50°C)

Humidity Tolerance: MT240A-R2,

MT245A–MT246A: 5 to 95%,

noncondensing;

MT241A: 9 to 95%,

noncondensing

Si e: MT240A-R2, MT241A:

7.3"H x 6.6"W x 1.6"D (18.5 x

16.8 x 4.1 cm);

MT245A–MT246A: 3.1"H x

0.95"W x 4.4"D (7.9 x 2.4 x

11.2 cm)

Weight: Standalone models:

2 l . (0.9 kg)

Specifications

Ordering Information

ITEM CODE

Micro NTU G.703

Standalone, AC.................................................MT240A-R2

Card

(Fits the MicroRACK. For product details, request Product Data

Sheet 12915.)

120-Ohm................................................................MT245A

75-Ohm..................................................................MT246A

Micro NTU G.703↔X.21............................................MT241A

You will need the appropriate cable and an adapter…

Adapter Ca le

HD26 Male to DB25 Male..............................EHN092-530

HD26 Male to M/34 Male..............................EHN092-V35

HD26 Male to DB15 Male .........................EHN092-X21M

G.703 75–120 Adapter........................................MT1242A-M

Use the Micro NTU G.703 standalone model to split off a

smaller piece of bandwidth for LAN comm nications.

LAN

PCs

Bridge/Router Micro NTUs

(MT240A-R2)

Bridge/Router

LAN

PCs

2.048 M ps

X.21 X.21

Ce manuel convient aux modèles suivants

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